I only have experience with PBD. I had great communication with the team. Car is pretty basic with 18+ manifold LU47s and 18+ air intake. A base file was sent. Logged and sent back for review. I think Trevor made a few tweaks and that was it. Car pulls smooth all the way to 7800. Shifts are crisp. It feels like a completely different car. Can't be happier with my PBD experience. YMMV!!